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Tamilselvi B, Bhuvaneshwari DS, Karuppasamy P, Padmavathy S, Nikhil S, Siddegowda SB, Ananda Murthy HC. Investigation of Corrosion Inhibition of Mild Steel in 0.5 M H 2SO 4 with Lachancea fermentati Inhibitor Extracted from Rotten Grapefruits ( Vitis vinifera): Adsorption, Thermodynamic, Electrochemical, and Quantum Chemical Studies. ACS PHYSICAL CHEMISTRY AU 2024; 4:67-84. [PMID: 38283783 PMCID: PMC10811774 DOI: 10.1021/acsphyschemau.3c00055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 10/24/2023] [Accepted: 10/24/2023] [Indexed: 01/30/2024]
Abstract
Corrosion inhibition of mild steel (MS) was studied using Lachancea fermentati isolate in 0.5 M H2SO4, which was isolated from rotten grapes (Vitis vinifera) via biofilm formation. Biofilm over the MS surface was asserted by employing FT-IR and FE-SEM with EDXS, electrochemical impedance spectroscopy (EIS), AFM, and DFT-ESP techniques. The weight loss experiments and temperature studies supported the physical adsorption behavior of the corrosion inhibitors. The maximum inhibition efficiency (IE) value (90%) was observed at 293 K for 9 × 106 cfu/mL of Lachancea fermentati isolate. The adsorption of Lachancea fermentati isolate on the surface of MS confirms Langmuir's adsorption isotherm model, and the -ΔG values indicate the spontaneous adsorption of inhibitor over the MS surface. Electrochemical studies, such as potentiodynamic polarization (PDP) and EIS were carried out to investigate the charge transfer (CT) reaction of the Lachancea fermentati isolate. Tafel polarization curves reveal that the Lachancea fermentati isolate acts as a mixed type of inhibitor. The Nyquist plots (EIS) indicate the increase in charge transfer resistance (Rct) and decrease of double-layer capacitance (Cdl) values when increasing the concentration of Lachancea fermentati isolate. The spectral studies, such as UV-vis and FT-IR, confirm the formation of a complex between MS and the Lachancea fermentati isolate inhibitor. The formation of biofilm on the MS surface was confirmed by FE-SEM, EDXS, and XPS analysis. The proposed bioinhibitor shows great potential for the corrosion inhibition of mild steel in acid media.
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Affiliation(s)
- Baluchamy Tamilselvi
- Department
of Chemistry, Thiagarajar College, Madurai 625009, Tamil Nadu, India
- Department
of Chemistry, K.L.N. College of Engineering, Pottapalaiyam 630612, Tamil Nadu, India
| | | | | | - Sethuramasamy Padmavathy
- Department
of Microbiology and Biotechnology, Thiagarajar
College, Madurai 625009, Tamil Nadu, India
| | - Santhosh Nikhil
- School
of Chemistry, Madurai Kamaraj University, Madurai 625009, Tamil Nadu, India
| | | | - H C Ananda Murthy
- Department
of Applied Chemistry, School of Applied Natural Science, Adama Science and Technology University, P.O. Box 1888 Adama, Ethiopia
- Department
of Prosthodontics, Saveetha Dental College & Hospital, Saveetha Institute of Medical and Technical Science
(SIMATS), Saveetha University, Chennai 600077, Tamil
Nadu, India
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Giraldo C, Chaves-López C, Tofalo R, Angrisani R, Rodrigues A, Montoya-Lerma J. Yeasts associated with the worker caste of the leaf-cutting ant Atta cephalotes under experimental conditions in Colombia. Arch Microbiol 2022; 204:284. [PMID: 35476294 DOI: 10.1007/s00203-022-02811-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 02/18/2022] [Indexed: 11/27/2022]
Abstract
Yeasts isolated from the worker caste of the Colombian leaf-cutting ant, Atta cephalotes (Hymenoptera: Myrmicinae) were cultured and identified by molecular methods. Abundant, persistent, and omnipresent species were classified as "prevalent". Experimental data were compared with information gathered from published reports on the yeast species composition in other leaf-cutting ant species. Diversity analysis was conducted using diversity values (q0, q1, and q2) to compare the richness and abundance of yeasts present in different leaf-cutting ant species. Clustering analysis was carried out to assess the similarity of yeast community according to ant species. The yeast species composition was highly variable among the ant species. A. laevigata and A. capiguara showed the highest degree of similarity and differed from the group composed by A. cephalotes, A. sexdens, A. sexdens rubropilosa, and A. texana. The isolation of dominant yeasts in different ant castes within the different compartments of a colony strongly suggests that the identified microorganisms are not transient but are native to the soil surrounding ant colonies and the substrates used by the ants to grow their fungal cultivars. It is apparent that the ant-fungus mutualism does not operate in an environment devoid of other microbes, but rather that the association must be seen within the context of a background of other microorganisms, particularly the dominant yeasts.
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Affiliation(s)
- Carolina Giraldo
- Departamento de Biología, Universidad del Valle, A.A. 25360, Cali, Colombia.
| | - Clemencia Chaves-López
- Facoltá di BioScience e Tecnologie Agro-Alimentari e Ambientali, Universitá Degli Studi di Teramo, Via R. Balzarini, 164100, Teramo, Italy
| | - Rosanna Tofalo
- Facoltá di BioScience e Tecnologie Agro-Alimentari e Ambientali, Universitá Degli Studi di Teramo, Via R. Balzarini, 164100, Teramo, Italy
| | - Roberto Angrisani
- NutriPlant S.R.L. Impianto Chimico per la Produzione Di Specialità Fertilizzanti per Agricoltura in Gestione Biologica e Convenzionale, S. S. 93 Km 46,400, 85024, Lavello, PZ, Italy
| | - Andre Rodrigues
- Department of General and Applied Biology, São Paulo State University (UNESP), Rio Claro, SP, Brazil
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Vega-Estévez S, Armitage A, Bates HJ, Harrison RJ, Buscaino A. The Genome of the CTG(Ser1) Yeast Scheffersomyces stipitis Is Plastic. mBio 2021; 12:e0187121. [PMID: 34488452 PMCID: PMC8546629 DOI: 10.1128/mbio.01871-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 08/05/2021] [Indexed: 11/20/2022] Open
Abstract
Microorganisms need to adapt to environmental changes, and genome plasticity can lead to rapid adaptation to hostile environments by increasing genetic diversity. Here, we investigate genome plasticity in the CTG(Ser1) yeast Scheffersomyces stipitis, an organism with an enormous potential for second-generation biofuel production. We demonstrate that S. stipitis has an intrinsically plastic genome and that different S. stipitis isolates have genomes with distinct chromosome organizations. Real-time evolution experiments show that S. stipitis genome plasticity is common and rapid since extensive genomic changes with fitness benefits are detected following in vitro evolution experiments. Hybrid MinION Nanopore and Illumina genome sequencing identify retrotransposons as major drivers of genome diversity. Indeed, the number and position of retrotransposons are different in different S. stipitis isolates, and retrotransposon-rich regions of the genome are sites of chromosome rearrangements. Our findings provide important insights into the adaptation strategies of the CTG(Ser1) yeast clade and have critical implications in the development of second-generation biofuels. These data highlight that genome plasticity is an essential factor for developing sustainable S. stipitis platforms for second-generation biofuels production. IMPORTANCE Genomes contain genes encoding the information needed to build the organism and allow it to grow and develop. Genomes are described as stable structures where genes have specific positions within a chromosome. Changes in gene dosage and position are viewed as harmful. However, it is becoming increasingly clear that genome plasticity can benefit microbial organisms that need to adapt rapidly to environmental changes. Mechanisms of genome plasticity are still poorly understood. This study focuses on Scheffersomyces stipitis, a yeast that holds great potential for second-generation biofuel production generated from forestry and agriculture waste. We demonstrate that S. stipitis chromosomes are easily reshuffled and that chromosome reshuffling is linked to adaptation to hostile environments. Genome sequencing demonstrates that mobile genetic elements, called transposons, mediate S. stipitis genome reshuffling. These data highlight that understanding genome plasticity is important for developing sustainable S. stipitis platforms for second-generation biofuels production.
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Affiliation(s)
- Samuel Vega-Estévez
- University of Kent, School of Biosciences, Kent Fungal Group, Canterbury Kent, United Kingdom
| | - Andrew Armitage
- Natural Resources Institute, University of Greenwich, Chatham Maritime, Kent, United Kingdom
| | | | | | - Alessia Buscaino
- University of Kent, School of Biosciences, Kent Fungal Group, Canterbury Kent, United Kingdom
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Vu D, Groenewald M, Verkley G. Convolutional neural networks improve fungal classification. Sci Rep 2020; 10:12628. [PMID: 32724224 PMCID: PMC7387343 DOI: 10.1038/s41598-020-69245-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Accepted: 07/06/2020] [Indexed: 01/30/2023] Open
Abstract
Sequence classification plays an important role in metagenomics studies. We assess the deep neural network approach for fungal sequence classification as it has emerged as a successful paradigm for big data classification and clustering. Two deep learning-based classifiers, a convolutional neural network (CNN) and a deep belief network (DBN) were trained using our recently released barcode datasets. Experimental results show that CNN outperformed the traditional BLAST classification and the most accurate machine learning based Ribosomal Database Project (RDP) classifier on datasets that had many of the labels present in the training datasets. When classifying an independent dataset namely the "Top 50 Most Wanted Fungi", CNN and DBN assigned less sequences than BLAST. However, they could assign much more sequences than the RDP classifier. In terms of efficiency, it took the machine learning classifiers up to two seconds to classify a test dataset while it was 53 s for BLAST. The result of the current study will enable us to speed up the taxonomic assignments for the fungal barcode sequences generated at our institute as ~ 70% of them still need to be validated for public release. In addition, it will help to quickly provide a taxonomic profile for metagenomics samples.
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Affiliation(s)
- Duong Vu
- Westerdijk Fungal Biodiversity Institute, Uppsalalaan 8, 3584CT, Utrecht, The Netherlands.
| | - Marizeth Groenewald
- Westerdijk Fungal Biodiversity Institute, Uppsalalaan 8, 3584CT, Utrecht, The Netherlands
| | - Gerard Verkley
- Westerdijk Fungal Biodiversity Institute, Uppsalalaan 8, 3584CT, Utrecht, The Netherlands
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Wang T, Gao C, Cheng Y, Li Z, Chen J, Guo L, Xu J. Molecular Diagnostics and Detection of Oomycetes on Fiber Crops. PLANTS (BASEL, SWITZERLAND) 2020; 9:E769. [PMID: 32575466 PMCID: PMC7355704 DOI: 10.3390/plants9060769] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 06/12/2020] [Accepted: 06/15/2020] [Indexed: 11/16/2022]
Abstract
Fiber crops are an important group of economic plants. Traditionally cultivated for fiber, fiber crops have also become sources of other materials such as food, animal feed, cosmetics and medicine. Asia and America are the two main production areas of fiber crops in the world. However, oomycete diseases have become an important factor limiting their yield and quality, causing devastating consequences for the production of fiber crops in many regions. To effectively control oomycete pathogens and reduce their negative impacts on these crops, it is very important to have fast and accurate detection systems, especially in the early stages of infection. With the rapid development of molecular biology, the diagnosis of plant pathogens has progressed from relying on traditional morphological features to the increasing use of molecular methods. The objective of this paper was to review the current status of research on molecular diagnosis of oomycete pathogens on fiber crops. Our search of PubMed identified nearly 30 species or subspecies of oomycetes on fiber crops, among which the top three species were Phytophthora boehmeriae, Phytophthora nicotianae and Pythium ultimum. The gene regions that have been used for molecular identifications of these pathogens include the internal transcribed spacer (ITS) regions of the nuclear ribosomal RNA gene cluster, and genes coding for translation elongation factor 1α (EF-1α) and mitochondrial cytochrome c oxidase subunits I and II (Cox 1, Cox 2), etc. We summarize the molecular assays that have been used to identify these pathogens and discuss potential areas of future development for fast, specific, and accurate diagnosis of oomycetes on fiber crops.
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Affiliation(s)
- Tuhong Wang
- Institute of Bast Fiber Crops and Center of Southern Economic Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China; (T.W.); (C.G.); (Y.C.); (Z.L.); (J.C.); (L.G.)
| | - Chunsheng Gao
- Institute of Bast Fiber Crops and Center of Southern Economic Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China; (T.W.); (C.G.); (Y.C.); (Z.L.); (J.C.); (L.G.)
| | - Yi Cheng
- Institute of Bast Fiber Crops and Center of Southern Economic Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China; (T.W.); (C.G.); (Y.C.); (Z.L.); (J.C.); (L.G.)
| | - Zhimin Li
- Institute of Bast Fiber Crops and Center of Southern Economic Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China; (T.W.); (C.G.); (Y.C.); (Z.L.); (J.C.); (L.G.)
| | - Jia Chen
- Institute of Bast Fiber Crops and Center of Southern Economic Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China; (T.W.); (C.G.); (Y.C.); (Z.L.); (J.C.); (L.G.)
| | - Litao Guo
- Institute of Bast Fiber Crops and Center of Southern Economic Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China; (T.W.); (C.G.); (Y.C.); (Z.L.); (J.C.); (L.G.)
| | - Jianping Xu
- Institute of Bast Fiber Crops and Center of Southern Economic Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China; (T.W.); (C.G.); (Y.C.); (Z.L.); (J.C.); (L.G.)
- Department of Biology, McMaster University, Hamilton, ON L8S 4K1, Canada
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6
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Agustini BC, da Silva GA, Bonfim TMB. MALDI-TOF MS Supplementary database for species identification employing the yeast diversity encountered on southern Brazil grapes. Folia Microbiol (Praha) 2018; 63:685-693. [PMID: 29752627 DOI: 10.1007/s12223-018-0607-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Accepted: 04/25/2018] [Indexed: 10/16/2022]
Abstract
The study of grape microflora is of interest when autochthonous yeasts, which are related to typical wine characteristics, are intended to be used in winemaking. The election of matrix-assisted laser desorption-ionization time-of-flight mass spectrometry (MALDI-TOF MS) as the first method for yeast identification was based on its accuracy and rapidity compared to alternative laboratory protocols for identification. The aims of this study are to consolidate the MALDI-TOF MS Supplementary database for environmental yeasts already constructed, to expand it through the addition of standard spectra of not included yeast species, and to discuss the grape microflora encountered in Southern Brazil. A total of 358 strains, isolated from grape berries, were submitted to protein profiling employing Biotyper and Supplementary database. Molecular biology techniques were used as alternatives to identify 6.4% of strains not promptly designated by protein profiling. These strains corresponded to the species Candida californica, Zygoascus meyerae, Candida akabanensis, Candida azyma, and Hanseniaspora vineae. The MALDI-TOF MS spectra of the identified species were added to Supplementary database. The presented results strengthen the need for further expansion of the mass spectra database to broaden its microbiological application.
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Affiliation(s)
- Bruna Carla Agustini
- Laboratory of Applied Microbiology, Embrapa Grape and Wine, Bento Gonçalves, RS, Brazil.
| | | | - Tania Maria Bordin Bonfim
- Laboratory of Enzymology and Fermentation Technology, Pharmacy Department, Federal University of Paraná, Curitiba, PR, Brazil
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7
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Polizzotto G, Barone E, Ponticello G, Fasciana T, Barbera D, Corona O, Amore G, Giammanco A, Oliva D. Isolation, identification and oenological characterization of non-Saccharomyces yeasts in a Mediterranean island. Lett Appl Microbiol 2017; 63:131-8. [PMID: 27261362 DOI: 10.1111/lam.12599] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 05/30/2016] [Accepted: 05/31/2016] [Indexed: 01/27/2023]
Abstract
UNLABELLED We isolated, identified and characterized yeast strains from grapes, and their fermented musts, sampled in the small island of Linosa, where there are no wineries and therefore the possibility of territory contamination by industrial strains is minimal. By traditional culture-dependent methods, we isolated 3805 colonies, distinguished by molecular methods in 17 different species. Five hundred and forty-four isolates were analysed for the main oenological characteristics such as fermentative vigour with and without sulphites, sugar consumption and production of alcohol, volatile acidity, hydrogen sulphide, glycerol and β-glucosidase. This analysis identified Kluyveromyces marxianus (seldomly used in winemaking) as the most interesting candidate yeast for the production of innovative wines. SIGNIFICANCE AND IMPACT OF THE STUDY In recent years, interest is growing for wine production by non-Saccharomyces yeasts, both in research and in the industry. This study describes the yeast population of the grapes in a small-secluded island in the Mediterranean Sea, useful site for the search of new strains. Evaluation of fundamental oenological characters identifies potential best yeasts to assay in experimental vinifications. We also describe, for the first time, 14 new colony morphologies on WL Nutrient Agar, culture medium used to monitor the yeast population dynamics.
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Affiliation(s)
- G Polizzotto
- Regional Institute of Wine and Oil, Palermo, Italy
| | - E Barone
- Regional Institute of Wine and Oil, Palermo, Italy
| | - G Ponticello
- Regional Institute of Wine and Oil, Palermo, Italy
| | - T Fasciana
- Regional Institute of Wine and Oil, Palermo, Italy.,Department of Sciences for Health Promotion and Mother-Child Care 'G. D' Alessandro', University of Palermo, Palermo, Italy
| | - D Barbera
- Regional Institute of Wine and Oil, Palermo, Italy
| | - O Corona
- Department of Agricultural Sciences and Forestry, University of Palermo, Palermo, Italy
| | - G Amore
- Regional Institute of Wine and Oil, Palermo, Italy
| | - A Giammanco
- Department of Sciences for Health Promotion and Mother-Child Care 'G. D' Alessandro', University of Palermo, Palermo, Italy
| | - D Oliva
- Regional Institute of Wine and Oil, Palermo, Italy
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8
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Belda I, Ruiz J, Alonso A, Marquina D, Santos A. The Biology of Pichia membranifaciens Killer Toxins. Toxins (Basel) 2017; 9:toxins9040112. [PMID: 28333108 PMCID: PMC5408186 DOI: 10.3390/toxins9040112] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Revised: 03/07/2017] [Accepted: 03/20/2017] [Indexed: 02/07/2023] Open
Abstract
The killer phenomenon is defined as the ability of some yeast to secrete toxins that are lethal to other sensitive yeasts and filamentous fungi. Since the discovery of strains of Saccharomyces cerevisiae capable of secreting killer toxins, much information has been gained regarding killer toxins and this fact has substantially contributed knowledge on fundamental aspects of cell biology and yeast genetics. The killer phenomenon has been studied in Pichia membranifaciens for several years, during which two toxins have been described. PMKT and PMKT2 are proteins of low molecular mass that bind to primary receptors located in the cell wall structure of sensitive yeast cells, linear (1→6)-β-d-glucans and mannoproteins for PMKT and PMKT2, respectively. Cwp2p also acts as a secondary receptor for PMKT. Killing of sensitive cells by PMKT is characterized by ionic movements across plasma membrane and an acidification of the intracellular pH triggering an activation of the High Osmolarity Glycerol (HOG) pathway. On the contrary, our investigations showed a mechanism of killing in which cells are arrested at an early S-phase by high concentrations of PMKT2. However, we concluded that induced mortality at low PMKT2 doses and also PMKT is indeed of an apoptotic nature. Killer yeasts and their toxins have found potential applications in several fields: in food and beverage production, as biocontrol agents, in yeast bio-typing, and as novel antimycotic agents. Accordingly, several applications have been found for P. membranifaciens killer toxins, ranging from pre- and post-harvest biocontrol of plant pathogens to applications during wine fermentation and ageing (inhibition of Botrytis cinerea, Brettanomyces bruxellensis, etc.).
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Affiliation(s)
- Ignacio Belda
- Department of Microbiology, Biology Faculty, Complutense University of Madrid, 28040 Madrid, Spain.
| | - Javier Ruiz
- Department of Microbiology, Biology Faculty, Complutense University of Madrid, 28040 Madrid, Spain.
| | - Alejandro Alonso
- Department of Microbiology, Biology Faculty, Complutense University of Madrid, 28040 Madrid, Spain.
| | - Domingo Marquina
- Department of Microbiology, Biology Faculty, Complutense University of Madrid, 28040 Madrid, Spain.
| | - Antonio Santos
- Department of Microbiology, Biology Faculty, Complutense University of Madrid, 28040 Madrid, Spain.
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9
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Technical note: use of internal transcribed spacer for ruminal yeast identification in dairy cows. Animal 2016; 10:1949-1954. [PMID: 27133003 DOI: 10.1017/s1751731116000768] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Molecular techniques are important tools for microbiological studies in different habitats, and the internal transcribed spacer (ITS) has been proved to be useful for analyzing fungal diversity. The aim of this study was to use the ITS region to generate ruminal yeast profile and to identify ruminal yeast. DNA from ruminal digesta was extracted to amplify the ribosomal ITS region. The profile from the PCR products was visualized and the excised bands from the profile were identified as the genera Millerozyma, Pichia, Rhizomucor and Hyphopichia. Overall, the ITS resulted to be a simple, fast and sensitive approach that allowed profiling and identification of ruminal yeast that have not been previously described (Millerozyma and Hyphopichia) in the rumen microbial community.
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10
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Dantán-González E, Quiroz-Castañeda RE, Cobaxin-Cárdenas M, Valle-Hernández J, Gama-Martínez Y, Tinoco-Valencia JR, Serrano-Carreón L, Ortiz-Hernández L. Impact of Meyerozyma guilliermondii isolated from chickens against Eimeria sp. protozoan, an in vitro analysis. BMC Vet Res 2015; 11:278. [PMID: 26552648 PMCID: PMC4640389 DOI: 10.1186/s12917-015-0589-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Accepted: 10/30/2015] [Indexed: 11/23/2022] Open
Abstract
Background Avian coccidiosis is a disease caused worldwide by several species of parasite Eimeria that causes significant economic losses. This disease affects chickens development and production, that most of times is controlled with anticoccidial drugs. Although efforts have been made to address this disease, they have been made to control Eimeria sporozoites, although enteric stages are often vulnerable, however; the parasite oocyst remains a problem that must be controlled, as it has a resistant structure that facilitates dispersion. Despite some commercial products based on chemical compounds have been developed as disinfectants that destroy oocysts, the solution of the problem remains to be solved. Results In this work, we assessed in vitro anticoccidial activity of a compound(s) secreted by yeast isolated in oocysts suspension from infected chickens. The yeast was molecularly identified as Meyerozyma guilliermondii, and its anticoccidial activity against Eimeria tenella oocysts was assessed. Here, we report the damage to oocysts walls caused by M. guilliermondii culture, supernatant, supernatant extract and intracellular proteins. In all cases, a significant decreased of oocysts was observed. Conclusions The yeast Meyerozyma guilliermondii secretes a compound with anticoccidial activity and also has a compound of protein nature that damages the resistant structure of oocyst, showing the potential of this yeast and its products as a feasible method of coccidiosis control. Electronic supplementary material The online version of this article (doi:10.1186/s12917-015-0589-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Edgar Dantán-González
- Laboratorio de Investigaciones Ambientales-Centro de Investigación en Biotecnología, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, Mexico.
| | - Rosa Estela Quiroz-Castañeda
- Unidad de Anaplasmosis del CENID-Parasitología Veterinaria, Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias, Juitepec, Morelos, Mexico.
| | - Mayra Cobaxin-Cárdenas
- Laboratorio de Investigaciones Ambientales-Centro de Investigación en Biotecnología, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, Mexico.
| | - Jorge Valle-Hernández
- Laboratorio de Investigaciones Ambientales-Centro de Investigación en Biotecnología, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, Mexico.
| | - Yitzel Gama-Martínez
- Facltad de Ciencias Biológicas, Universidad Autónoma del Estado de Morelos, Cuernavaca, Mexico.
| | - José Raunel Tinoco-Valencia
- Unidad de Escalamiento y Planta Piloto-Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, Mexico.
| | - Leobardo Serrano-Carreón
- Unidad de Escalamiento y Planta Piloto-Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, Mexico.
| | - Laura Ortiz-Hernández
- Laboratorio de Investigaciones Ambientales-Centro de Investigación en Biotecnología, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, Mexico.
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Genetic diversity of Clavispora lusitaniae isolated from Agave fourcroydes Lem, as revealed by DNA fingerprinting. J Microbiol 2015; 53:14-20. [PMID: 25557477 DOI: 10.1007/s12275-015-4373-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Revised: 10/24/2014] [Accepted: 11/01/2014] [Indexed: 10/24/2022]
Abstract
This study characterized Clavispora lusitaniae strains isolated from different stages of the processing and early fermentation of a henequen (Agave fourcroydes) spirit produced in Yucatan, Mexico using a molecular technique. Sixteen strains identified based on morphological features, obtained from different substrates, were typed molecularly. Nine different versions of the divergent D1/D2 domain of the large-subunit ribosomal DNA sequence were identified among the C. lusitaniae strains. The greatest degree of polymorphism was found in the 90-bp structural motif of the D2 domain. The MSP-PCR technique was able to differentiate 100% of the isolates. This study provides significant insight into the genetic diversity of the mycobiota present during the henequen fermentation process, especially that of C. lusitaniae, for which only a few studies in plants have been published. The applied MSP-PCR markers were very efficient in revealing olymorphisms between isolates of this species.
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12
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Technological characterization and probiotic traits of yeasts isolated from Altamura sourdough to select promising microorganisms as functional starter cultures for cereal-based products. Food Microbiol 2014; 38:26-35. [DOI: 10.1016/j.fm.2013.08.006] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Revised: 07/30/2013] [Accepted: 08/14/2013] [Indexed: 11/19/2022]
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13
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Agustini BC, Silva LP, Bloch C, Bonfim TMB, da Silva GA. Evaluation of MALDI-TOF mass spectrometry for identification of environmental yeasts and development of supplementary database. Appl Microbiol Biotechnol 2014; 98:5645-54. [PMID: 24687751 DOI: 10.1007/s00253-014-5686-7] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2014] [Revised: 03/08/2014] [Accepted: 03/11/2014] [Indexed: 11/29/2022]
Abstract
Yeast identification using traditional methods which employ morphological, physiological, and biochemical characteristics can be considered a hard task as it requires experienced microbiologists and a rigorous control in culture conditions that could implicate in different outcomes. Considering clinical or industrial applications, the fast and accurate identification of microorganisms is a crescent demand. Hence, molecular biology approaches has been extensively used and, more recently, protein profiling using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) has proved to be an even more efficient tool for taxonomic purposes. Nonetheless, concerning to mass spectrometry, data available for the differentiation of yeast species for industrial purpose is limited and reference databases commercially available comprise almost exclusively clinical microorganisms. In this context, studies focusing on environmental isolates are required to extend the existing databases. The development of a supplementary database and the assessment of a commercial database for taxonomic identifications of environmental yeast are the aims of this study. We challenge MALDI-TOF MS to create protein profiles for 845 yeast strains isolated from grape must and 67.7 % of the strains were successfully identified according to previously available manufacturer database. The remaining 32.3 % strains were not identified due to the absence of a reference spectrum. After matching the correct taxon for these strains by using molecular biology approaches, the spectra concerning the missing species were added in a supplementary database. This new library was able to accurately predict unidentified species at first instance by MALDI-TOF MS, proving it is a powerful tool for the identification of environmental yeasts.
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Affiliation(s)
- Bruna Carla Agustini
- Laboratório de Microbiologia Aplicada, EMBRAPA Uva e Vinho, Bento Gonçalves, RS, Brazil
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Romi W, Keisam S, Ahmed G, Jeyaram K. Reliable differentiation of Meyerozyma guilliermondii from Meyerozyma caribbica by internal transcribed spacer restriction fingerprinting. BMC Microbiol 2014; 14:52. [PMID: 24575831 PMCID: PMC3946169 DOI: 10.1186/1471-2180-14-52] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Accepted: 02/24/2014] [Indexed: 11/10/2022] Open
Abstract
Background Meyerozyma guilliermondii (anamorph Candida guilliermondii) and Meyerozyma caribbica (anamorph Candida fermentati) are closely related species of the genetically heterogenous M. guilliermondii complex. Conventional phenotypic methods frequently misidentify the species within this complex and also with other species of the Saccharomycotina CTG clade. Even the long-established sequencing of large subunit (LSU) rRNA gene remains ambiguous. We also faced similar problem during identification of yeast isolates of M. guilliermondii complex from indigenous bamboo shoot fermentation in North East India. There is a need for development of reliable and accurate identification methods for these closely related species because of their increasing importance as emerging infectious yeasts and associated biotechnological attributes. Results We targeted the highly variable internal transcribed spacer (ITS) region (ITS1-5.8S-ITS2) and identified seven restriction enzymes through in silico analysis for differentiating M. guilliermondii from M. caribbica. Fifty five isolates of M. guilliermondii complex which could not be delineated into species-specific taxonomic ranks by API 20 C AUX and LSU rRNA gene D1/D2 sequencing were subjected to ITS-restriction fragment length polymorphism (ITS-RFLP) analysis. TaqI ITS-RFLP distinctly differentiated the isolates into M. guilliermondii (47 isolates) and M. caribbica (08 isolates) with reproducible species-specific patterns similar to the in silico prediction. The reliability of this method was validated by ITS1-5.8S-ITS2 sequencing, mitochondrial DNA RFLP and electrophoretic karyotyping. Conclusions We herein described a reliable ITS-RFLP method for distinct differentiation of frequently misidentified M. guilliermondii from M. caribbica. Even though in silico analysis differentiated other closely related species of M. guilliermondii complex from the above two species, it is yet to be confirmed by in vitro analysis using reference strains. This method can be used as a reliable tool for rapid and accurate identification of closely related species of M. guilliermondii complex and for differentiating emerging infectious yeasts of the Saccharomycotina CTG clade.
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Affiliation(s)
| | | | | | - Kumaraswamy Jeyaram
- Microbial Resources Division, Institute of Bioresources and Sustainable Development (IBSD), Takyelpat Institutional Area, Imphal 795001, Manipur, India.
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Lv XC, Huang XL, Zhang W, Rao PF, Ni L. Yeast diversity of traditional alcohol fermentation starters for Hong Qu glutinous rice wine brewing, revealed by culture-dependent and culture-independent methods. Food Control 2013. [DOI: 10.1016/j.foodcont.2013.04.020] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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16
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Comparative evaluation of the Bruker Biotyper and Vitek MS matrix-assisted laser desorption ionization-time of flight (MALDI-TOF) mass spectrometry systems for identification of yeasts of medical importance. J Clin Microbiol 2013; 51:2453-7. [PMID: 23678071 DOI: 10.1128/jcm.00841-13] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
We report the first comparative evaluation between the Bruker Biotyper MS (BMS) and the Vitek MS (VMS) for the identification of yeasts. The rate of correct identifications at the species level was comparable using the commercial databases (89.8% versus 84.3%; P = 0.712), but higher for BMS using an in-house-extended database (100% versus 84.3%; P = 0.245). Importantly, the rate of misidentification was significantly higher for VMS (1% versus 12.1%; P < 0.0001), including the rate of major errors (0% versus 4.5%; P = 0.0036).
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DWI JATMIKO YOGA, DE BARROS LOPES MIGUEL, D BARTON MARY. Molecular Identification of Yeasts Isolated from Dadih by RFLP-PCR and Assessment on Their Ability in Utilizing Lactate. MICROBIOLOGY INDONESIA 2012. [DOI: 10.5454/mi.6.1.5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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19
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Bovo B, Nardi T, Fontana F, Carlot M, Giacomini A, Corich V. Acidification of grape marc for alcoholic beverage production: Effects on indigenous microflora and aroma profile after distillation. Int J Food Microbiol 2012; 152:100-6. [DOI: 10.1016/j.ijfoodmicro.2011.10.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2011] [Revised: 10/09/2011] [Accepted: 10/11/2011] [Indexed: 10/16/2022]
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20
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Slechta ES, Hohmann SL, Simmon K, Hanson KE. Internal transcribed spacer region sequence analysis using SmartGene IDNS software for the identification of unusual clinical yeast isolates. Med Mycol 2011; 50:458-66. [PMID: 22103344 DOI: 10.3109/13693786.2011.630683] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Rapid and accurate identification of clinically important yeasts is essential given their inherent differences in antifungal susceptibility. We implemented nucleic acid sequencing for those species that could not be identified by phenotypic methods. Internal Transcribed Spacer region 1 and 2 (ITS1 and ITS2) sequences were investigated using SmartGene IDNS software, an rDNA sequence database and analysis program for microbial identification (ID). Over a 2.5-year period, 2,938 specimens were evaluated. Most (94%) isolates were fully identified by conventional methods, with Candida species accounting for the majority of them. Of the 169 organisms that required molecular analysis, 79% were identified to species level, 19% to genus and 2% remained unresolved. Sequenced isolates encompassed 33 unique species of which approximately half (52%) were common pathogens with atypical biochemical profiles and the remainder were rarer yeast species. A significant proportion (33%) of sequenced organisms displayed elevated MICs to fluconazole. Our experience supports the use of molecular techniques as an adjunct to conventional methods for the identification of medically important yeasts. Susceptibility testing alone may provide valuable treatment information in situations where phenotypic assessments are inconclusive and molecular or proteomic testing is not readily available.
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Affiliation(s)
- E Susan Slechta
- ARUP Institute for Clinical and Experimental Pathology, Salt Lake City, UT, USA
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21
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Settanni L, Tanguler H, Moschetti G, Reale S, Gargano V, Erten H. Evolution of fermenting microbiota in tarhana produced under controlled technological conditions. Food Microbiol 2011; 28:1367-73. [DOI: 10.1016/j.fm.2011.06.008] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2011] [Revised: 06/08/2011] [Accepted: 06/13/2011] [Indexed: 11/26/2022]
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22
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Herendael BH, Bruynseels P, Bensaid M, Boekhout T, Baere T, Surmont I, Mertens AH. Validation of a modified algorithm for the identification of yeast isolates using matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry (MALDI-TOF MS). Eur J Clin Microbiol Infect Dis 2011; 31:841-8. [DOI: 10.1007/s10096-011-1383-y] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2011] [Accepted: 08/03/2011] [Indexed: 11/28/2022]
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23
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Muccilli S, Caggia C, Randazzo CL, Restuccia C. Yeast dynamics during the fermentation of brined green olives treated in the field with kaolin and Bordeaux mixture to control the olive fruit fly. Int J Food Microbiol 2011; 148:15-22. [DOI: 10.1016/j.ijfoodmicro.2011.04.019] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2010] [Revised: 04/14/2011] [Accepted: 04/17/2011] [Indexed: 11/27/2022]
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24
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Characterization of yeasts from Portuguese brined olives, with a focus on their potentially probiotic behavior. Lebensm Wiss Technol 2011. [DOI: 10.1016/j.lwt.2011.01.029] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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25
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Bautista-Gallego J, Rodríguez-Gómez F, Barrio E, Querol A, Garrido-Fernández A, Arroyo-López FN. Exploring the yeast biodiversity of green table olive industrial fermentations for technological applications. Int J Food Microbiol 2011; 147:89-96. [PMID: 21497408 DOI: 10.1016/j.ijfoodmicro.2011.03.013] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2010] [Revised: 02/21/2011] [Accepted: 03/22/2011] [Indexed: 11/18/2022]
Abstract
In recent years, there has been an increasing interest in identifying and characterizing the yeast populations associated with diverse types of table olive elaborations because of the many desirable technological properties of these microorganisms. In this work, a total of 199 yeast isolates were directly obtained from industrial green table olive fermentations and genetically identified by means of a RFLP analysis of the 5.8S-ITS region and sequencing of the D1/D2 domains of the 26S rDNA gene. Candida diddensiae, Saccharomyces cerevisiae and Pichia membranifaciens were the most abundant yeast species isolated from directly brined Aloreña olives, while for Gordal and Manzanilla cultivars they were Candida tropicalis, Pichia galeiformis and Wickerhamomyces anomalus. In the case of Gordal and Manzanilla green olives processed according to the Spanish style, the predominant yeasts were Debaryomyces etchellsii, C. tropicalis, P. galeiformis and Kluyveromyces lactis. Biochemical activities of technological interest were then qualitatively determined for isolates belonging to all yeast species. This preliminary screening identified two isolates of W. anomalus with interesting properties, such as a strong β-glucosidase and esterase activity, and a moderate catalase and lipolytic activity, which were also confirmed by quantitative assays. The results obtained in this survey show the potential use that some yeast species could have as starters, alone or in combination with lactic acid bacteria, during olive processing.
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Affiliation(s)
- J Bautista-Gallego
- Departamento de Biotecnología de Alimentos, Instituto de la Grasa (CSIC), Avda, Padre García Tejero, Sevilla, Spain
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26
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Rodríguez-Gómez F, Arroyo-López F, López-López A, Bautista-Gallego J, Garrido-Fernández A. Lipolytic activity of the yeast species associated with the fermentation/storage phase of ripe olive processing. Food Microbiol 2010; 27:604-12. [DOI: 10.1016/j.fm.2010.02.003] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2009] [Revised: 02/04/2010] [Accepted: 02/10/2010] [Indexed: 10/19/2022]
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Sinigaglia M, Di Benedetto N, Bevilacqua A, Corbo MR, Capece A, Romano P. Yeasts isolated from olive mill wastewaters from southern Italy: technological characterization and potential use for phenol removal. Appl Microbiol Biotechnol 2010; 87:2345-54. [PMID: 20532759 DOI: 10.1007/s00253-010-2684-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2010] [Revised: 05/13/2010] [Accepted: 05/13/2010] [Indexed: 11/25/2022]
Abstract
Olive mill wastewater (OMW) samples from two traditional varieties (Peranzana and Ogliarola Garganica) of Apulian region (southern Italy) and produced through continuous and traditional methods were microbiologically and chemically examined; thus, 104 yeasts were isolated and selected for further analyses. The strains were identified as Candida boidinii, Pichia holstii, Pichia membranifaciens, and Saccharomyces cerevisiae and analyzed to assess their suitability to metabolize phenols. Based on phenol metabolism, 27 strains were selected and inoculated into OMW aliquots to determine their ability to reduce phenols in vivo; then, five strains (identified with the codes 682-C. boidinii and 625, 642, 647, and 941-P. holstii) were used as a cocktail in wastewaters for a final validation step. In this last experiment, the effects of the temperature (10-30 degrees C) and (NH(4))(2)SO(4) (0.0-6.0 g l(-1)) were studied through a central composite design approach, and the results highlighted that the cocktail was able to reduce phenols by 40% at 10 degrees C with 6.0 g l(-1) of (NH(4))(2)SO(4) added.
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28
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Ogataea cecidiorum sp. nov., a methanol-assimilating yeast isolated from galls on willow leaves. Antonie van Leeuwenhoek 2010; 98:93-101. [DOI: 10.1007/s10482-010-9433-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2009] [Accepted: 03/22/2010] [Indexed: 10/19/2022]
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29
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Tanahashi M, Kubota K, Matsushita N, Togashi K. Discovery of mycangia and the associated xylose-fermenting yeasts in stag beetles (Coleoptera: Lucanidae). Naturwissenschaften 2010; 97:311-7. [PMID: 20107974 DOI: 10.1007/s00114-009-0643-5] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2009] [Revised: 12/17/2009] [Accepted: 12/18/2009] [Indexed: 11/29/2022]
Abstract
Most wood-feeding insects need an association with microbes to utilize wood as food, and some have special organs to store and convey the microbes. We report here the discovery of the microbe-storage organ (mycangium) in stag beetles (Coleoptera: Lucanidae), which develop in decayed wood. The mycangium, which was discovered in the abdomen, is present in all adult females of 22 lucanid species examined in this study, but absent in adult males. By contrast, adult insects of both sexes of selected Passalidae, Geotrupidae, and Scarabaeidae, which are related to Lucanidae, lacked mycangia similar to those of the lucanid species. Yeast-like microbes were isolated from the mycangium of five lucanid species. DNA sequence analyses indicate that the microbes are closely related to the xylose-fermenting yeasts Pichia stipitis, Pichia segobiensis, or Pichia sp. known from the gut of a passalid species.
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Affiliation(s)
- Masahiko Tanahashi
- Laboratory of Forest Zoology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan.
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Valmorri S, Tofalo R, Settanni L, Corsetti A, Suzzi G. Yeast microbiota associated with spontaneous sourdough fermentations in the production of traditional wheat sourdough breads of the Abruzzo region (Italy). Antonie van Leeuwenhoek 2009; 97:119-29. [PMID: 19904626 DOI: 10.1007/s10482-009-9392-x] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2009] [Accepted: 10/21/2009] [Indexed: 11/27/2022]
Abstract
The aims of this study were to describe the yeast community of 20 sourdoughs collected from central Italy and to characterize the sourdoughs based on chemical properties. A polyphasic approach consisting of traditional culture-based tests (spore-forming and physiological tests) and molecular techniques (PCR-RFLP, RAPD-PCR, PCR-DGGE) and chemical analysis (total acidity, acids, and sugar contents), was utilized to describe the yeast population and to investigate the chemical composition of the doughs. PCR-RFLP analysis identified 85% of the isolates as Saccharomyces cerevisiae, with the other dominant species being Candida milleri (11%), Candida krusei (2.5%), and Torulaspora delbrueckii (1%). RAPD-PCR analysis, performed with primers M13 and LA1, highlighted intraspecific polymorphism among the S. cerevisiae strains. The diversity of the sourdoughs from the Abruzzo region is reflected in the chemical composition, yeast species, and strain polymorphism. Our approach using a combination of phenotypic and genotypic methods identified the yeast species in the 20 sourdough samples and provided a complete overview of the yeast populations found in sourdoughs from the Abruzzo region.
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Affiliation(s)
- Sara Valmorri
- Department of Food Science, University of Teramo, Via CR Lerici 1, 64023 Mosciano Sant'Angelo, Teramo, Italy
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31
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Natural yeast flora of different varieties of grapes used for wine making in India. Food Microbiol 2009; 26:801-8. [PMID: 19835764 DOI: 10.1016/j.fm.2009.05.005] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2009] [Revised: 05/01/2009] [Accepted: 05/13/2009] [Indexed: 11/23/2022]
Abstract
The natural Saccharomyces and non-Saccharomyces yeast flora present on the grape berries significantly affect wine production. Six grape varieties, Bangalore blue, Zinfandel, Cabernet, Chenin Blanc, Sauvignon Blanc and Shiraz are being used in India for wine making. The yeast diversity was studied on the basis of morphological, colony, physiological characteristics and 5.8S-ITS sequencing of rDNA of the isolates. Eleven different species belonging to seven genera were identified as: Candida azyma, Candida quercitrusa, Debaryomyces hansenii, Hanseniaspora guilliermondii, Hanseniaspora viniae, Hanseniaspora uvarum, Issatchenkia orientalis, Issatchenkia terricola, Pichia membranifaciens, Saccharomyces cerevisiae and Zygoascus steatolyticus. H. guilliermondii was the predominant species while S. cerevisiae was observed occasionally in the six vine varieties. For the first time, C. azyma was isolated from Bangalore blue and Cabernet varieties grown in different localities. This association may be attributed to the change in cropping pattern from sugarcane to viticulture in the vine growing regions and the known association of C. azyma with sugarcane phylloplane. Further analysis of the indigenous strains and the qualitative and quantitative changes in the flora during fermentation will be useful to understand wine quality and to design preservation strategies to control wine spoilage.
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Tofalo R, Chaves-López C, Di Fabio F, Schirone M, Felis GE, Torriani S, Paparella A, Suzzi G. Molecular identification and osmotolerant profile of wine yeasts that ferment a high sugar grape must. Int J Food Microbiol 2009; 130:179-87. [PMID: 19230999 DOI: 10.1016/j.ijfoodmicro.2009.01.024] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2008] [Revised: 01/20/2009] [Accepted: 01/21/2009] [Indexed: 11/29/2022]
Abstract
The objective of this study was to examine the Saccharomyces and non-Saccharomyces yeast populations involved in a spontaneous fermentation of a traditional high sugar must (Vino cotto) produced in central Italy. Molecular identification of a total of 78 isolates was achieved by a combination of PCR-RFLP of the 5.8S ITS rRNA region and sequencing of the D1/D2 domain of the 26S rRNA gene. In addition, the isolates were differentiated by RAPD-PCR. Only a restricted number of osmotolerant yeast species, i.e. Candida apicola, Candida zemplinina and Zygosaccharomyces bailii, were found throughout all the fermentation process, while Saccharomyces cerevisiae prevailed after 15 days of fermentation. A physiological characterization of isolates was performed in relation to the resistance to osmotic stress and ethanol concentration. The osmotolerant features of C. apicola, C. zemplinina and Z. bailii were confirmed, while S. cerevisiae strains showed three patterns of growth in response to different glucose concentrations (2%, 20%, 40% and 60% w/v). The ability of some C. apicola and C. zemplinina strains to grow at 14% v/v ethanol is noteworthy. The finding that some yeast biotypes with higher multiple stress tolerance can persist in the entire winemaking process suggests possible future candidates as starter for Vino cotto production.
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Affiliation(s)
- Rosanna Tofalo
- Dipartimento di Scienze degli Alimenti, Università degli Studi di Teramo, Via C.R. Lerici 1, 64023 Mosciano Sant'Angelo, Teramo, Italy
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Büchl NR, Wenning M, Seiler H, Mietke-Hofmann H, Scherer S. Reliable identification of closely relatedIssatchenkiaandPichiaspecies using artificial neural network analysis of Fourier-transform infrared spectra. Yeast 2008; 25:787-98. [DOI: 10.1002/yea.1633] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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34
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Rapid differentiation of phenotypically similar yeast species by single-strand conformation polymorphism analysis of ribosomal DNA. Appl Environ Microbiol 2008; 74:2604-11. [PMID: 18344345 DOI: 10.1128/aem.02223-07] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Single-strand conformation polymorphism (SSCP) analysis of ribosomal DNA (rDNA) was investigated for rapid differentiation of phenotypically similar yeast species. Sensitive tests indicated that some yeast strains with one, most strains with two, and all strains with three or more nucleotide differences in the internal transcribed spacer 1 (ITS1) or ITS2 region could be distinguished by PCR SSCP analysis. The discriminative power of SSCP in yeast species differentiation was demonstrated by comparative studies of representative groups of yeast species from ascomycetes and basidiomycetes, including Saccharomyces species, medically important Candida species, and phylloplane basidiomycetous yeast species. Though the species within each group selected are closely related and have relatively similar rDNA sequences, they were clearly differentiated by PCR-SSCP analysis of the ITS1 region, given the amplified fragments were less than 350 bp in sizes. By using SSCP analysis for rapid screening of yeast strains with different rDNA sequences, species diversity existing in a large collection of yeast strains from natural sources was effectively and thoroughly investigated with substantially reduced time and cost in subsequent DNA sequencing.
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Rossi F, Dellaglio F. Quality of silages from Italian farms as attested by number and identity of microbial indicators. J Appl Microbiol 2007; 103:1707-15. [DOI: 10.1111/j.1365-2672.2007.03416.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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36
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Current awareness on yeast. Yeast 2007. [DOI: 10.1002/yea.1325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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